Apparatus for elevating liquids.



A. PRIESTMAN.

APPARATUS POR BLEVATING LIQUIDS. APPLIOATION FILED JULY 17, 1913.

THE NORRIS PETERS CD., PHOTO-LITHO.; WASHINGTON, Dft:

ALBERT PRIESTMAN,

OF NEW YQBK, N. Y.

APPARATUS FOB.- lilliEl/'liTlNGr LIQUIDS.

incassa.

Original application filed April 27, 1912,-Seria1 No. 693,691.

Specification of Letters Patent.`

Patented July "i, 1914.

Divided. and this application filed July 17,

1913. Serial No. 779,411.

To all whom t may concern Be it known that I, ALBERT PRIESTMAN, a subject of the King of England, and a resident of the borough of Manhattan, city and county of New York, State of New York, have invented an improvement in Apparatus for Elevating Liquids, of which the following is a specification.

It is the object of my invention to enable sewage, and like fluids containing solid matter in suspension, to be lifted more economically and eliiciently than has heretofore been possible. On the one hand, the costs of installation, up-keep and operation must be considered, on the other, deterioration, and operative efficiency.

A. system that may operate at a higher hydro-dynamic'efficiency, though of greater cost of installation, may be wholly unsatisfactory and uneconomical because of deterioration and lack of operative efficiency. The greatest difficulty met in systems of elevating sewage is the presence, in such large quantity, of solid matter in suspension, which must pass through the lifting apparatus. This solid matter, if permitted to collect within the lifting devices, will increase the wear and tear and cause frequent stoppages, thereby reducing the efficiency and necessitating constant manual attention with the additional cost incident thereto.l

The liquid portion of sewage, which constitutesl by far the greater part, may be lifted with the greatest efiiciency and economy by a pump, but the solids, if passed through the pump, will quickly collect therein and render it inefficient. The sewage may be lifted by air pressure from an ejector without bringing any of the solid matter in contact with the valves, or operative parts, but such systems do not have the best economical quality, because of the large amount of liquid which must be handled.

In carrying out my invention I first separate the greater part of the solid matter from the liquid, and then separately discharge the sludge and separated liquid to the desired level. This enables me to use an ordinary pump for raising and ldischarging the liquid, and an ejector operated by air pressure or other means for raising and discharging the sludge, or separated solid matter.- .The operation of the pump may be controlled automatically by the level of the separated liquid, and this means may' yalso be' employed for admitting air to the ejector to discharge the sludge therefrom.

The invention also includesy devices for effectively separating the liquid from the sludge and separately discharging them to their respective lifting devices, and means for preventing the clogging of the separating screen by the lodgment of solid matter therein, and for controlling the operation of the ejector independently of the accumulation of the liquid separated from the sludge.

The drawing shows a diagrammatic arrangement of an apparatus for raising sewage embodyingthe invention.

The sewage enters by the inlet pipe a. and is discharged through the outlet a into a well o, preferably below a screen b. While I have shown a comparatively small well b, it is to be understood that it may be enlarged to any extent necessary to eect the desired separation in the sewage supplied. Above the screen b is a passageway o into a well c from the bottom of which a suction pipe c2 leads to a circulating pump d, from which the discharge pipe o3 leads to the main 04. From the bottom of the chamber Z) a pipe g leads to an ejector c, which, as shown, is operated by compressed air, and from which the discharge pipe e leads to the main c4.

I have shown an ejecting apparatus of the character shown and described in Letters Patent 979,698, dated December 27, 1910, to Albert Priestman and Edward C. Moore, in which the contents of the vessel c are discharged intermittently by measured charges of compressed air admitted to the vessel c through'an air-pipe f under the control of valve devices p. ln the apparatus shown in that patent the valve devices p are controlled by air pressure through a pipe leading from the vessel e, but in the present instance they are controlled by air pressure through a pipe 7', leading from the air tank h and having a connection f2 with the 100 valve devices for controlling their operation in the manner described in said patent. The particular character( of the valve devices or means for controlling the supply of air to the ejector e is not, however, material to the present invention. The compressed air which is admitted to the ejector e under the control of the valve device p is sup: plied by a pipe h from the air tank 711; v

isvan air' compressor by which air under L10 'through the pipe i. As shown the compressor z' 1s driven from the pump Z by a belt 2.

j is an electrically driven motor beltedv to the pump cl and controlled by the switch c.

m is a .float in the well c having an 0perating connection m with the switch 7c.

a is an air-bell in an upper extension 0,2 of the supply pipe a and is connected byan air pipe f3 withthe valvedevice@ 0 is a spray pipe in the chamber b above the screenfb" supplied by a -pipeo and controlled by a valve s which isoperated by a ioat t in the chamber b.

The operationot this apparatusis as follows: vThe sewage enters the chambery Z9' through the inlet a below thev Screen b. The solid matter falls to the bottom, and the liquid, strained bythe screenfb", lpasses through the openingyc into the welll c. When lthe liquid in the well c has'atta'llled a predetermined levelnitl lifts fthe; float m and closes the switch 7c putting `the motor j into operationrto drive the pump Z iandjair compressor z',

The Vpumpi` removesthe liquid from the well lc and discharges it through the pipe c3 to the main c4y or elsewhere, until the level of the yliquid in c is again lowered lto an extent sufficient, for thefloat m to .open the switch cgand stop the f motor. l Meanwhile the ycompressor c' has. been accumulating pressure in the.l tankfgh, and when ya predetermined pressure is attained-a small por. tion of air is discharged through the pipe 7"v tothe valve devices p, actuating them to open and admit a ycharge of compressed air to the ejector ye to discharge the sludge which has gravita-tedy therein through the pipe gfrom .thehamber-b. As soon asy the contents 'of thechamben have fallen to a sufficient extent to operate thel loatvt,'f. e. belowthe ,screen b', the valve. s is, opened and water-is thrown .by thespray-pipe 10 uimnthescreen b tofclean it. If the-screen bf should'become clogged the sewage will riseinftheextension a3 and force air through divisio1;i It .isf to be understood alsothat in speaking of sludge l and liquid 'Ijd'o not mean that alll liquid isto be separatedfrom the solid mat-tenor `that avperfectfand com plete. separation musttake place-i; In actual operation a quantity of liquid will remain with the solids and pass through the ejector or solids-elevating apparatus, but the object is to remove the greater part of the solids from the liquid, so that the liquid mayL pass through a pumpV or equivalent liquid-elevating apparatus, with as little ,foulingof the working parts as possible.

What I claim is as follows:

l. In apparatus for elevating sewage and like fluids containing solid matter in suspension, the combination of a well to receive the l sewage, a second well having communication with the upper part of ther-iirst well to receive theliquid from the top of the sewage therein, a receptacle having communication aov with the bottom of the first Well to receive Y the sludge therefrom, means. to withdraw the liquids from the second well, and means to discharge the sludge from the sludgey receptacle.

2. In apparatus for elevatinglsewageand vlike fluids containing solid matter insuspension, the combination of a well to receive the sewage, a secondfwell having co-Iiirlllni* cation with the upper part fof the ist' well to receive the liquid from Vthe top of the charged.

3. In apparatus for elevating sewageand like fluids containing `solid matter ,l inv sus- Ipension, the combination otacwell to. re-

ceive the sewage, a second Well4 havingcomi munication withthe-upper fpart of the'rst. jwell to receive theliquid from the-top ,of I the sewage therein, a receptacle having comf municationkwith the bottom of thefirst ywell -`to' receive the sludge therefrom, means yto withdraw the liquids from theseco-nd Vwell.

controlled by the level of the liquid therein,

and means to discharge the sludge from the1 sludge receptacle.`

4i. In apparatus for elevating sewage and like fluids containingpsolid lmatter in sus pensiomthe combinationvof a well toreceive `the sewage, a.screen in said] well, an-inlet pipe for sewage leadingtosaid well belowy the tscreen, a ,second -Well communicating withtheirst well above, the screen, means. towithdraw the liquid fromv Ysaid :secondwell, a lreceptacle communicatillgliwith theL p rst .wellibelowthe screen, and-means to dis.-l charge the,` contents of said receptacle,

5. In apparatus for. elevating sewage andl like iuids eontainingsolid matter in sus-V pensiongthe combination cfa :wehrte-receive. the-sewage, a.- screen in said well, lan inlet pipe forsewage leading to said. wellwbelow i. the, screen, l a. second Well Communicating.

with the first well above the screen, a pump to withdraw the liquid from said second well, a receptacle communicating with the first well below the screen, and means to discharge the contents of said receptacle.

6. In apparatus for elevating sewage and like fluids containing solid matter in suspension, the combination of a well to receive the sewage, a screen in said well, an inlet pipe for sewage leading to said well below the screen, a second well communieating with the rst well above the screen, means to withdraw the liquid from said second well, a receptacle communicating with the first well below the screen, and an airejector to discharge the co-ntents of said receptacle.

7. In apparatus for elevating sewage and like fluids containing solid matter in suspension, the combination of a well to receive the sewage, a screen in said well, an inlet pipe for sewage leading to said well below the screen, a second well communicating with the first well above the screen, means to withdraw the liquid from said second well, a receptacle communicating withthe first well below the screen, and means to discharge the contents of said receptacle, washing devices to supply water to the screen after the contents of the first well are wholly or partially discharged.

8. In apparatus for elevatingsewage and like fluids containing solid matter in suspension, the combination of a well to receive the sewage, a s'creen in said well, an inlet pipe for sewage leading to said well below the screen, a second well communicating with the first well above the screen, meansy to withdraw the liquid from said second well, a receptacle communicating with the first well below the screen, and means to discharge the contents of said receptacle, washing devices to supply water to the screen after the contents of the firstwellare wholly or partially discharged controlled by the level of the sewage in said first well.

9. In apparatus for elevating sewage and like fluids containing solid matter in suspension, the combination of a well to receive the sewage, a screen in said well, an inlet pipe for sewage leading to said well below the screen, a second well communicating with the first well above the screen, means controlled by the level of the liquid in said second well to withdraw the contents thereof, and means to discharge the contents of the first well from below the screen.

10. In apparatus for elevating sewage and like fluids containing solid matter in suspension, the combination of a well to receive the sewage, a screen in said well, an inlet pipe for sewage leading to said well below the screen, a second well communicating with the first well above the screen, a pump for pumping the contents from said second well,

a floatf in said second well for controlling the operation of said pump, and means for independently discharging the sludge from the first well from below the screen.

11. In. apparatus for elevating sewage and like fluids containing solid matter in suspension, the combination of a well to receive the sewage, means for withdrawing the liquid from the upper part of said well, an ejector connected with the lower part of said well, an air pressure pipe leading to said ejector to supply air thereto for the purpose of ejecting its contents, and means to control the supply of air to said air-pipe controlled by the level of the liquid.

12. In apparatus for elevating sewage and like fluids containing solid matter in suspension, the combination of a well to receive the sewage, means for withdrawing the liquid from the upper part of said well, an ejector connected with the lower part of said well, an air pressure pipe leading to said ejector to supply air thereto for the purpose of ejecting its contents, and means to control the supply of air to said air-pipe controlled by the level of the liquid discharged from the upper part of the first well.

13. In apparatus for elevating sewage and like fluids containing solid matter in suspension, the combination of a well to receivethe sewage, means for withdrawing the liquid from the upper part of said well, an ejector connected with the lower part of said well, an air pressure pipe leading to said ejector to supply air thereto for the purpose of ejecting its contents, and means to control the supply of air to said airpipe controlled by the level of' the sewage supplied to the first well.

14. In apparatus for elevating sewage and like fluids containing solid matter in suspension, the combination of a well to receive the sewage, means for .withdrawing the liquid from the upper part of said well, an ejector connected with the lower part of said ejector to supply air thereto for the purpose of' ejecting its contents, and means to control the supply of air to said air-pipe controlled both by the level of the liquid discharged from the upper part of the first well and also by the level of the sewage supplied to the first well.

15. In apparatus for elevating sewage and like fluids containing solid matter in suspension, the combination of a well to receive the sewage, means for separating the liquid from the sludge at said well, an air actuated ejector for receiving the sludge and discharging it by air pressure, a pump for pumping the separated liquids, and means controlled by the level of the separated liquids for controlling the operation of the pump and ejector.

16. In apparatus for elevating sewage and Sli =well,"an air pressure pipe leading to said l g means controlled by the level of the sepacharging it by air pressure, a ,pump fori pumping the separa-ted liquids, means conf trolled bythe level of theseparated liquids for controlling the operation `of the pump and ejector, and means controlled., by the level ofthe sewage in the .well for also controlling the operation of the ejector. l

17. In apparatus for elevating sewage anc like fluids containing solid matter in 'suse pension, the combination of a'weljl to receive the sewage, means for separating the liquidl `reservoir and operated by said pump, and means controlled by the level of the liquid from the sludge at said well, an air actuated ejectorfor receiving the sludge, a reservoir containing compressed air, ajpressure pipe leading from said reservoir to the ejector, an automatically controlled valve in said pipe, and means for separately removing the separated liquid.

18. In apparatus for elevating sewage and likel fluids containing solid matter in suspension, the combination of a Well to receive the sewage, means for separating the liquid from the sludge at said well, an air actuated ejector for receiving the sludge, a reservoir containing compressed air, a pressure `pipe leading from lsaid reservoir to the ejector, a valve in said pipe, means for, separatelyremoving tlie separated liquid, and means controlled by the levelv or" the separated liquid to control said valve in the air pipe.

19. In apparatus for elevating sewagefand like fluids containing solid matter in suspension, the combination of a well to re`v ceive the sewage, means for separating the 5 liquid from the sludge at said well, an air i runto set my hand.

actuated ejector for receiving the sludge, a reservoir containing compressed air, a pressure pipe leading from said reservoir to the ejector, a valve in said pipe, means for separately removing the separated liquid,

' rated liquid to` control said valve in the air pipe, and means controlled by the level of the sewage. in thewell to also control said valve. c v

20. In apparatus for elevating sewage and like fluids containing `solid;-matter in .suspension, the combinati'onof a well to receive 1tlie sewage, a second well receiving liquid from the upper ypart of the first well, an air actuated ejector receiving the sludge from the bottom of the first well,`a reservoir conl taining compressed air, a pipe leading from `said air reservoir to the ejector, an auto-V finatic valve in said air pipe, va pump for pumping the liquid from the second well,

an air compressor connectedl with the air in .the second well for controlling the op. eration of said pump.r

21. In apparatus for elevating sewage and like fluids containing solid matter in sus. pension, the combination of a well to receive the sewage, a second well receiving liquid frointhe upper part of the first well, air actuated ejector receiving Vthe sludge from the bottom of the first well, a reservoir containing compressed air, apipe' leadingfrom said air reservoir to the ejector, an automatic valve in said air pipe, a ypump for. pumping the liquid from` the second well,

an air compressor connected with tlie air reservo-ir and operated bysaid p,ump,means controlled Vby the level of the liquid inthe second well for controlling the operationof said pump, andy meansV controlled by the levelv of tlie sewage at the first` wellfor independently controllingvthe valve inthe airpipe. In testimony of-whicli invention, I here- ERNEST HOWARD HUNTER, R., M. Kampf.

Copies ot this patent may be obtained for mq cents', fyf''qqr'esgsipg the Commissioner ofB-tellt' Washington., D.; 03, r` i 

